Hal L. Smith

15.7k total citations · 4 hit papers
155 papers, 11.0k citations indexed

About

Hal L. Smith is a scholar working on Public Health, Environmental and Occupational Health, Genetics and Modeling and Simulation. According to data from OpenAlex, Hal L. Smith has authored 155 papers receiving a total of 11.0k indexed citations (citations by other indexed papers that have themselves been cited), including 80 papers in Public Health, Environmental and Occupational Health, 55 papers in Genetics and 36 papers in Modeling and Simulation. Recurrent topics in Hal L. Smith's work include Mathematical and Theoretical Epidemiology and Ecology Models (80 papers), Evolution and Genetic Dynamics (53 papers) and Mathematical Biology Tumor Growth (30 papers). Hal L. Smith is often cited by papers focused on Mathematical and Theoretical Epidemiology and Ecology Models (80 papers), Evolution and Genetic Dynamics (53 papers) and Mathematical Biology Tumor Growth (30 papers). Hal L. Smith collaborates with scholars based in United States, Cyprus and Canada. Hal L. Smith's co-authors include Paul Waltman, Horst R. Thieme, Morris W. Hirsch, Patrick De Leenheer, R. H. Martin, Yang Kuang, Douglas C. Speirs, Xiao-Qiang Zhao, Xiao‐Qiang Zhao and John Mallet‐Paret and has published in prestigious journals such as Journal of the American Chemical Society, PLoS ONE and Journal of Applied Ecology.

In The Last Decade

Hal L. Smith

154 papers receiving 10.0k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Monotone Dynamical Systems: An Introduction to the Theory of Competitive and Cooperative Systems

2008 1.5k citations Hal L. Smith profile →
An Introduction to Delay Differential Equations with Applications to the Life Sciences

2010 753 citations Hal L. Smith profile →
The Theory of the Chemostat

1995 711 citations Hal L. Smith, Paul Waltman profile →
The Theory of the Chemostat: Dynamics of Microbial Competition.

1996 557 citations Hal L. Smith, Paul Waltman et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Hal L. Smith United States	47	6.8k	4.1k	3.6k	1.6k	1.4k	155	11.0k
Shigui Ruan United States	65	11.4k 1.7×	6.3k 1.5×	6.2k 1.7×	2.8k 1.8×	497 0.4×	271	15.1k
Lansun Chen China	50	8.2k 1.2×	4.4k 1.1×	3.5k 1.0×	1.5k 0.9×	419 0.3×	345	9.6k
H. I. Freedman Canada	41	6.1k 0.9×	4.0k 1.0×	2.6k 0.7×	1.1k 0.7×	301 0.2×	122	7.7k
Yang Kuang United States	48	5.5k 0.8×	3.6k 0.9×	2.8k 0.8×	1.1k 0.7×	311 0.2×	202	8.6k
Odo Diekmann Netherlands	43	4.9k 0.7×	3.2k 0.8×	3.8k 1.1×	516 0.3×	328 0.2×	140	9.6k
Paul Waltman United States	39	4.6k 0.7×	3.1k 0.8×	2.0k 0.5×	832 0.5×	383 0.3×	108	7.0k
Horst R. Thieme United States	39	5.3k 0.8×	3.4k 0.8×	3.3k 0.9×	514 0.3×	482 0.4×	129	6.9k
Junping Shi United States	48	4.7k 0.7×	2.9k 0.7×	2.3k 0.6×	1.8k 1.2×	498 0.4×	190	7.0k
Xingfu Zou Canada	47	5.4k 0.8×	3.1k 0.8×	2.5k 0.7×	2.0k 1.2×	424 0.3×	167	7.2k
Xiao‐Qiang Zhao Canada	48	7.1k 1.1×	4.0k 1.0×	4.2k 1.1×	962 0.6×	409 0.3×	201	8.2k

Countries citing papers authored by Hal L. Smith

Since Specialization

Citations

This map shows the geographic impact of Hal L. Smith's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Hal L. Smith with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hal L. Smith more than expected).

Fields of papers citing papers by Hal L. Smith

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Hal L. Smith. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Hal L. Smith. The network helps show where Hal L. Smith may publish in the future.

Co-authorship network of co-authors of Hal L. Smith

This figure shows the co-authorship network connecting the top 25 collaborators of Hal L. Smith. A scholar is included among the top collaborators of Hal L. Smith based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Hal L. Smith. Hal L. Smith is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Allen, E.J., Linda J. S. Allen, & Hal L. Smith. (2020). On real-valued SDE and nonnegative-valued SDE population models with demographic variability. Journal of Mathematical Biology. 81(2). 487–515. 7 indexed citations

Thieme, Horst R. & Hal L. Smith. (2013). Chemostats and epidemics: Competition for nutrients/hosts. Mathematical Biosciences & Engineering. 10(5/6). 1635–1650. 18 indexed citations

Jones, Don A. & Hal L. Smith. (2011). Bacteriophage and Bacteria in a Flow Reactor. Bulletin of Mathematical Biology. 73(10). 2357–2383. 6 indexed citations

Smith, Hal L. & Horst R. Thieme. (2010). Dynamical Systems and Population Persistence. Graduate studies in mathematics. 335 indexed citations

Smith, Hal L.. (2008). Models of Virulent Phage Growth with Application to Phage Therapy. SIAM Journal on Applied Mathematics. 68(6). 1717–1737. 26 indexed citations

Smith, Hal L.. (2006). The Discrete Dynamics of Monotonically Decomposable Maps. Journal of Mathematical Biology. 53(4). 747–758. 41 indexed citations

Jones, D. A., Hristo V. Kojouharov, Dung Le, & Hal L. Smith. (2003). Microbial competition for nutrient in a 3D flow reactor. 10. 57–67. 2 indexed citations

Smith, Hal L. & Horst R. Thieme. (2001). Stable Coexistence and Bi-stability for Competitive Systems on Ordered Banach Spaces. Journal of Differential Equations. 176(1). 195–222. 38 indexed citations

Smith, Hal L., et al.. (2000). Stable Periodic Orbits for a Predator–Prey Model with Delay. Journal of Mathematical Analysis and Applications. 249(2). 324–339. 15 indexed citations

10.

Smith, Hal L. & Xiao‐Qiang Zhao. (1999). Dynamics of a Periodically Pulsed Bio-reactor Model. Journal of Differential Equations. 155(2). 368–404. 40 indexed citations

11.

Mischaikow, Konstantin, Hal L. Smith, & Horst R. Thieme. (1995). Asymptotically Autonomous Semiflows: Chain Recurrence and Lyapunov Functions. Transactions of the American Mathematical Society. 347(5). 1669–1669. 30 indexed citations

12.

Mischaikow, Konstantin, Hal L. Smith, & Horst R. Thieme. (1995). Asymptotically autonomous semiflows: chain recurrence and Lyapunov functions. Transactions of the American Mathematical Society. 347(5). 1669–1685. 175 indexed citations

13.

Zhu, Han & Hal L. Smith. (1994). Stable Periodic Orbits for a Class of Three Dimensional Competitive Systems. Journal of Differential Equations. 110(1). 143–156. 50 indexed citations

14.

Smith, Hal L. & Paul Waltman. (1994). Competition for a Single Limiting Resource in Continuous Culture: The Variable-Yield Model. SIAM Journal on Applied Mathematics. 54(4). 1113–1131. 58 indexed citations

15.

Kuang, Yang & Hal L. Smith. (1993). Global Stability for Infinite Delay Lotka-Volterra Type Systems. Journal of Differential Equations. 103(2). 221–246. 141 indexed citations

16.

Smith, Hal L. & Horst R. Thieme. (1990). Monotone semiflows in scalar non-quasi-monotone functional differential equations. Journal of Mathematical Analysis and Applications. 150(2). 289–306. 49 indexed citations

17.

Smith, Hal L.. (1983). Multiple stable subharmonics for a periodic epidemic model. Journal of Mathematical Biology. 17(2). 179–190. 44 indexed citations

18.

Schmitt, Klaus & Hal L. Smith. (1979). On eigenvalue problems for nondifferentiable mappings. Journal of Differential Equations. 33(3). 294–319. 33 indexed citations

19.

Smith, Hal L.. (1978). Periodic solutions for a class of epidemic equations. Journal of Mathematical Analysis and Applications. 64(2). 467–479. 5 indexed citations

20.

Gatica, Juan A. & Hal L. Smith. (1977). Fixed point techniques in a cone with applications. Journal of Mathematical Analysis and Applications. 61(1). 58–71. 27 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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